Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12108701 | Walk power mower with transmission providing both forward and reverse propulsion | Chadwick A. Shaffer, Todd A. Porter | 2024-10-08 |
| 11653594 | Walk power mower with transmission providing both forward and reverse propulsion | Chadwick A. Shaffer, Todd A. Porter | 2023-05-23 |
| 10834871 | Walk power mower with transmission providing both forward and reverse propulsion | Chadwick A. Shaffer, Todd A. Porter | 2020-11-17 |
| 10488421 | Methods for reducing the risk of osteoarthritis of the knee | Kenneth L. Cameron | 2019-11-26 |
| 10041955 | Methods and apparatus for assessment of risk for joint injury | Kenneth L. Cameron | 2018-08-07 |
| 9829493 | Methods and apparatus for assessment of risk for joint injury | Kenneth L. Cameron | 2017-11-28 |
| 9420924 | Oscillating airstream nozzle for debris blower | Chadwick A. Shaffer, Dana R. Lonn | 2016-08-23 |
| D735428 | Nozzle for a debris blower | Chadwick A. Shaffer | 2015-07-28 |
| 8701377 | Dual bladed walk power mower with timed blade drive system carried on an apron of a power source mount | Chris A. Wadzinski, Ryan J. Volovsek, John O. Hurst | 2014-04-22 |
| 8602334 | Debris vacuum with supplemental debris shearing surface | Chadwick A. Shaffer | 2013-12-10 |
| 8539745 | Dual bladed walk power mower with rear bagging mode | Larry W. Schmidt, Chris A. Wadzinski | 2013-09-24 |
| 7506403 | Blower/vac debris collection system with collection bag on movable wheeled cart | Daniel R. Shemon, Mark Allen Pankratz, James R. Baumann | 2009-03-24 |
| 6629818 | Impeller for use with portable blower/vacuums | — | 2003-10-07 |
| 6442790 | Portable blower/vacuum having air inlet cover attachable to blower tube | Chadwick A. Shaffer | 2002-09-03 |
| D461604 | Housing for a blower/vacuum | David J. Martin, Chadwick A. Shaffer | 2002-08-13 |
| 6324720 | Portable blower tube noise reduction | Thomas J. Beckey, Rodney D. Lund, Steve R. Porter, Chadwick A. Shaffer | 2001-12-04 |
| 6158082 | Portable blower with blower tube noise reduction | Thomas J. Beckey, Rodney D. Lund, Steve R. Porter, Chadwick A. Shaffer | 2000-12-12 |
| 6059541 | Air inlet cover for portable blower/vacuum | Thomas J. Beckey, Steven R. Porter, Chadwick A. Shaffer | 2000-05-09 |
| 5979013 | Portable blower with noise reduction | Thomas J. Beckey, Steven R. Porter, Rodney D. Lund, Chadwick A. Shaffer, Steven T. O'Brien | 1999-11-09 |
| 5689852 | Portable blower/vac | Dean R. Toensing | 1997-11-25 |
| 5560078 | Portable Blower/Vac | Dean R. Toensing, Anthony N. Pink | 1996-10-01 |
| 5535479 | Portable blower/vacuum handle arrangement | Anthony N. Pink, Dean R. Toensing | 1996-07-16 |
| 5109722 | Self-detenting transmission shift key | Donald L. Hufnagle | 1992-05-05 |
| 4756101 | Swing wheel snowthrower | Nathan J. Friberg | 1988-07-12 |